摘要
大容量风电并网条件下的系统功角稳定特性对于新能源送出与消纳具有重要意义。基于双馈风力发电机组的运行与控制原理分析了其出力特性,指出双馈机组在暂态稳定分析中可近似看做恒功率源;结合实测曲线,说明恒功率源模型较实际情况更具保守性。以并列运行同步机组故障清除后输出电磁功率为指标,研究送端电网风火互替对于系统功角稳定水平的影响,提出双馈风电等量替代同步电源将改善功角稳定水平,并从系统能量平衡角度进一步探讨了其内在原理与适用范围。最后,通过单机?无穷大系统、两机系统和哈密风火打捆送出系统算例仿真验证了上述结论。
System power angle stability characteristics under condition of large amount of integrated wind power are important for new energy delivery and accommodation. Based on analysis of output characteristics and control principle of doubly-fed inductor generators（DFIG）, the issue that DFIG could be treated as constant power resource in transient analysis is presented. Conservative feature of constant power resource model is demonstrated by comparing with measured curve of DFIG. Effect of replacing thermal power with DFIG in sending end on power system stability is studied with index of parallel operating synchronous generator＇ electromagnetic power at moment of fault clearance, and further analysis of inherent principle of energy balance is performed. Correctness is verified with simulation results of example cases including single machine infinite bus power system, two-region power system and Hami grid.
出处
《电网技术》
EI
CSCD
北大核心
2015年第12期3401-3407,共7页
Power System Technology
关键词
双馈风电机组
功率特性
风火互替
功角稳定
doubly-fed inductor generators
power characteristics
replacement of synchronous generator with DFIG
power angle stability
